Separate handshake from encryption method

1 files changed, 80 insertions, 0 deletions

diff --git a/src/method_null.c b/src/method_null.c
new file mode 100644
index 0000000..fbdf1f5
--- /dev/null
+++ b/src/method_null.c
@@ -0,0 +1,80 @@
+/*
+  Copyright (c) 2012, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "fastd.h"
+
+
+static size_t method_max_packet_size(fastd_context *ctx) {
+	return fastd_max_packet_size(ctx);
+}
+
+static size_t method_min_head_space(fastd_context *ctx) {
+	return 0;
+}
+
+static fastd_method_session_state* method_session_init(fastd_context *ctx, uint8_t *secret, size_t length, bool initiator) {
+	if (initiator)
+		return (fastd_method_session_state*)1;
+	else
+		return (fastd_method_session_state*)2;
+}
+
+static bool method_session_is_valid(fastd_context *ctx, fastd_method_session_state *session) {
+	return session;
+}
+
+static bool method_session_is_initiator(fastd_context *ctx, fastd_method_session_state *session) {
+	return (session == (fastd_method_session_state*)1);
+}
+
+static bool method_session_want_refresh(fastd_context *ctx, fastd_method_session_state *session) {
+	return false;
+}
+
+static void method_session_free(fastd_context *ctx, fastd_method_session_state *session) {
+}
+
+static bool method_passthrough(fastd_context *ctx, fastd_method_session_state *session, fastd_buffer *out, fastd_buffer in) {
+	*out = in;
+	return true;
+}
+
+const fastd_method fastd_method_null = {
+	.name = "null",
+
+	.max_packet_size = method_max_packet_size,
+	.min_encrypt_head_space = method_min_head_space,
+	.min_decrypt_head_space = method_min_head_space,
+
+	.session_init = method_session_init,
+	.session_is_valid = method_session_is_valid,
+	.session_is_initiator = method_session_is_initiator,
+	.session_want_refresh = method_session_want_refresh,
+	.session_free = method_session_free,
+
+	.encrypt = method_passthrough,
+	.decrypt = method_passthrough,
+};